Power plant desulfurization wastewater treatment device

Abstract

The utility model relates to the technical field of thermal power plant wastewater treatment, in particular to a power plant desulfurization wastewater treatment device which comprises a wastewater treatment cabinet, a primary treatment tank and a secondary treatment tank, and the primary treatment tank and the secondary treatment tank are arranged in the wastewater treatment cabinet. A plurality of heating pipes are arranged on the peripheral wall of the inner side of the first-stage treatment tank at equal intervals, and the second-stage treatment tank is rotationally connected to the right side of the wastewater treatment cabinet; an infusion pump is connected between the first-stage treatment tank and the second-stage treatment tank, a cover plate is detachably connected to the top of the first-stage treatment tank, and a blocking and filtering mechanism extending to the bottom of the first-stage treatment tank is arranged on the cover plate; the problems that in the prior art, due to the fact that most structures such as a stirring rod are arranged in a treatment box in the using process of a desulfurization waste water multi-stage treatment device used in a thermal power plant, equipment decay is easily caused by waste water, the service life of the waste water treatment device is greatly shortened, the device is inconvenient to overhaul or maintain, and the cost is high are solved. And the wastewater treatment effect is easily influenced.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology in thermal power plants, and specifically to a device for treating desulfurization wastewater from power plants. Background Technology

[0002] Desulfurization wastewater is mainly the discharge water from the absorption tower during the wet desulfurization process of boiler flue gas. This type of discharge water contains a large amount of ammonia nitrogen ions. Excessive ammonia nitrogen discharged into water bodies will lead to eutrophication, reduce the aesthetic value of the water bodies, and the nitrates and nitrites generated by oxidation will also affect the health of aquatic organisms and even humans. Therefore, wastewater denitrification treatment has received widespread attention.

[0003] Limestone-gypsum wet desulfurization technology is currently the most widely used flue gas desulfurization technology in thermal power plants. During the operation of the desulfurization unit, a large amount of wastewater, namely desulfurization wastewater, is discharged periodically. This wastewater is characterized by high concentrations of suspended solids, inorganic salts, and heavy metal ions. The desulfurization wastewater treatment process uses chemical dosing methods, which often employ neutralization, precipitation, flocculation, concentration, and clarification.

[0004] Chinese Patent Publication No. CN220951467U discloses a multi-stage treatment device for desulfurization wastewater, including a primary treatment tank, a secondary treatment tank located at one side of the primary treatment tank, a feed inlet 1 on the upper side of the primary treatment tank, a feed inlet 2 on the upper side of the secondary treatment tank, and a pump installed on the outside of the primary treatment tank. This invention adds potassium permanganate oxidant into the primary treatment tank through the feed inlet 1. A rotating shaft drives multiple heating plates to rotate synchronously, simultaneously stirring and heating the wastewater. Stirring improves the oxidation effect of the wastewater, and simultaneous heating ensures more uniform heating. Heating reduces the viscosity of the wastewater, facilitating subsequent solid-liquid separation. The filter plates filter the fixed sediment, allowing the wastewater to fall separately for easy extraction. This invention solves the problem of uneven heating of wastewater affecting treatment efficiency in existing methods.

[0005] In actual use, multi-stage desulfurization wastewater treatment devices for thermal power plants, such as those mentioned above, are prone to corrosion due to the presence of stirring rods and other structures inside the treatment tank. This significantly shortens the lifespan of the wastewater treatment device and makes it difficult to inspect or maintain, which can easily affect the wastewater treatment effect. Utility Model Content

[0006] The purpose of this utility model is to provide a power plant desulfurization wastewater treatment device, which overcomes the problems of existing multi-stage desulfurization wastewater treatment devices used in thermal power plants. During use, most of the structures, such as the stirring rod, are located inside the treatment tank, which makes the equipment prone to corrosion due to wastewater, greatly shortening the service life of the wastewater treatment device. It is also inconvenient to inspect or maintain the device, which can easily affect the wastewater treatment effect.

[0007] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0008] A power plant desulfurization wastewater treatment device was designed, featuring a self-rotating secondary treatment tank. This effectively prevents corrosion of the agitator structure by the wastewater, thus extending its service life. Furthermore, the tank's forward and reverse rotation ensures continuous agitation during the wastewater treatment process. Combined with the filtration mechanism, this effectively guarantees the wastewater treatment outcome. The specific scheme is as follows:

[0009] A power plant desulfurization wastewater treatment device includes a wastewater treatment cabinet, and a primary treatment tank and a secondary treatment tank installed inside the wastewater treatment cabinet. The primary treatment tank is rotatably connected to the left side of the wastewater treatment cabinet, and multiple heating pipes extending vertically are equidistantly arranged on the inner peripheral wall of the primary treatment tank. The secondary treatment tank is rotatably connected to the right side of the wastewater treatment cabinet.

[0010] A liquid pump is connected between the primary treatment tank and the secondary treatment tank. The liquid pump is located at the center of the bottom inside the wastewater treatment tank. A cover plate is detachably connected to the top of the primary treatment tank. A sealing and filtering mechanism extending to the bottom of the primary treatment tank is provided on the cover plate.

[0011] Preferably, a first mounting edge is provided on the outer side of the bottom of the cover plate, and a second mounting edge is provided on the outer side of the top of the primary treatment tank. The first mounting edge and the second mounting edge are fastened together by a plurality of fastening bolts.

[0012] A water injection pipe is installed through the left side of the cover plate, and a filter pocket is embedded in the opening of the water injection pipe.

[0013] Preferably, a first motor is provided on the left side of the wastewater treatment cabinet, and a first bevel gear is connected to the output end of the first motor;

[0014] A first conical toothed ring is fitted onto the outer side of the lower end of the primary treatment tank, and the first conical toothed ring meshes with the first bevel gear.

[0015] The bottom of the primary treatment tank is rotatably connected to a first solenoid valve via a water outlet pipe, and a first connecting pipe connects the first solenoid valve to the liquid pump.

[0016] Preferably, the sealing and filtering mechanism includes a drive rod, a first spring plate, a first spring, a second spring plate, a second spring, a rubber sealing frustum, and a filter cover. The drive rod passes through the cover plate and extends to the bottom of the primary treatment tank.

[0017] The first spring plate is connected to the upper end of the drive rod, the second spring plate is connected to the lower end of the drive rod, the filter cover is sleeved on the lower end of the drive rod and covers the outside of the water outlet pipe at the bottom of the primary treatment tank, and the rubber sealing frustum is connected to the lower end of the drive rod and seals the water outlet pipe at the bottom of the primary treatment tank.

[0018] Both the first spring and the second spring are sleeved on the drive rod. The first spring abuts between the first spring plate and the cover plate, and the second spring abuts between the second spring plate and the filter cover.

[0019] Preferably, the filter cover is cylindrical, with a through guide hole at the top of the filter cover, the guide hole being slidably connected to the drive rod, and an outwardly extending inverted conical filter cover at the bottom of the filter cover, the inverted conical filter cover abutting against the inner wall of the bottom of the primary treatment tank.

[0020] Preferably, a second motor is provided on the right side of the wastewater treatment cabinet, and a second bevel gear is connected to the output end of the second motor;

[0021] A second conical toothed ring is sleeved on the outer side of the lower end of the secondary treatment tank, and the second conical toothed ring meshes with the second bevel gear;

[0022] The bottom of the secondary treatment tank is rotatably connected to a second solenoid valve via a water outlet pipe. A drain pipe is connected to the second solenoid valve, which passes through the right side of the bottom of the wastewater treatment tank. A second connecting pipe is provided between the secondary treatment tank and the liquid pump.

[0023] Preferably, the wastewater treatment tank is provided with two symmetrically shaped flip-up doors on the front side, and the two flip-up doors correspond to the primary treatment tank and the secondary treatment tank, respectively.

[0024] The beneficial effects of this utility model are:

[0025] 1. This utility model adopts a two-stage wastewater treatment method. In the wastewater treatment process, the wastewater generated by the thermal power plant can be desulfurized step by step, and the precipitates can be effectively separated. After further treatment, the wastewater can be discharged after meeting the standards, so as to ensure the wastewater treatment effect.

[0026] 2. In this utility model, the forward and reverse rotation of the treatment tank is used to replace the stirring work in the wastewater treatment process, which can effectively avoid corrosion caused by the stirring structure being immersed in wastewater, thereby greatly improving its service life and reducing its production cost.

[0027] 3. This utility model can directly filter the sediment generated during the wastewater treatment process into the filter cover at the bottom of the primary treatment tank, and can be removed for cleaning at any time. Cabinet doors are provided on the front side of the wastewater treatment tank, which is conducive to the inspection and maintenance of the wastewater treatment tank, thereby extending the service life of the device and improving its wastewater treatment effect. Attached Figure Description

[0028] Figure 1 This is a front view of the present invention;

[0029] Figure 2 This is a top view of the present invention;

[0030] Figure 3 for Figure 2 Schematic diagram of the cross section at point AA;

[0031] Figure 4 for Figure 3 Schematic diagram of the cross section at point BB;

[0032] Figure 5 This is a schematic diagram of the filter bag structure in this utility model;

[0033] Figure 6 This is a schematic diagram of the filter cover in this utility model.

[0034] In the diagram: 1-Wastewater treatment tank; 11-Flip-over cabinet door; 2-Primary treatment tank; 21-Second mounting edge; 22-Fastening bolt; 23-First conical toothed ring; 24-First solenoid valve; 25-First connecting pipe; 3-Secondary treatment tank; 31-Baffle; 32-Second conical toothed ring; 4-Sealing filter mechanism; 41-Drive rod; 42-First spring plate; 43-First spring; 44-Second spring plate; 45-Second spring; 46-Rubber sealing frustum; 47-Filter cover; 471-Guide hole; 472-Inverted conical filter cover; 5-Cover plate; 51-Water injection pipe; 52-Filter pocket; 6-First motor; 61-First bevel gear; 7-Second motor; 71-Second bevel gear; 8-Liquid pump; 81-Second connecting pipe; 9-Heating pipe. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0036] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other embodiments, well-known structures, circuits, materials, or methods are not specifically described in order to avoid obscuring the present invention.

[0037] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0039] like Figure 1-6As shown, this utility model provides a power plant desulfurization wastewater treatment device, including a wastewater treatment tank 1, and a primary treatment tank 2 and a secondary treatment tank 3 installed inside the wastewater treatment tank 1. Through the two-stage treatment, the discharged water can meet discharge standards. The primary treatment tank 2 is rotatably connected to the left side of the wastewater treatment tank 1, and its rotation replaces the internal stirring of the wastewater, thereby accelerating the wastewater treatment efficiency and ensuring the treatment effect. Multiple heating pipes 9 extending vertically are equidistantly arranged on the inner periphery of the primary treatment tank 2. Heating through the heating pipes 9 promotes oxidation and accelerates the reaction between wastewater and oxidant. The secondary treatment tank 3 is rotatably connected to the right side of the wastewater treatment cabinet 1. The secondary treatment tank 3 can also replace the stirring work by rotating itself, thus accelerating the internal reaction. A liquid pump 8 is connected between the primary treatment tank 2 and the secondary treatment tank 3. The liquid pump 8 is located at the bottom center of the inner side of the wastewater treatment cabinet 1. The liquid pump 8 can realize the transportation work in the wastewater treatment process to ensure the orderly progress of the wastewater treatment work. The top of the primary treatment tank 2 is detachably connected to the cover plate 5. The cover plate 5 is equipped with a sealing filter mechanism 4 that extends to the bottom of the primary treatment tank 2, which can filter and clean the sediment generated in the wastewater treatment.

[0040] In the above scheme, a first mounting edge 53 is provided on the outer side of the bottom of the cover plate 5, and a second mounting edge 21 is provided on the outer side of the top of the primary treatment tank 2. The first mounting edge 53 and the second mounting edge 21 are fastened by multiple fastening bolts 22. A water injection pipe 51 is provided through the left side of the cover plate 5, and a filter pocket 52 is embedded in the opening of the water injection pipe 51.

[0041] As an optimized technical solution of this utility model, the first mounting edge 53 and the second mounting edge 21 can be firmly connected by the fastening bolt 22 to ensure that the cover plate 5 is stably installed on the top of the primary treatment tank 2. The water injection pipe 51 on the cover plate 5 can inject the wastewater generated by the thermal power plant into the primary treatment tank 2, and the filter bag 52 installed inside can filter out the impurities contained in the wastewater, thereby preventing impurities from falling into the primary treatment tank 2 and affecting its treatment work.

[0042] In the above scheme, a first motor 6 is provided on the left side of the wastewater treatment tank 1, and a first bevel gear 61 is connected to the output end of the first motor 6; a first conical toothed ring 23 is sleeved on the outer side of the lower end of the primary treatment tank 2, and the first conical toothed ring 23 meshes with the first bevel gear 61; a first solenoid valve 24 is rotatably connected to the bottom of the primary treatment tank 2 through a water outlet pipe, and a first connecting pipe 25 is connected between the first solenoid valve 24 and the liquid pump 8.

[0043] As an optimized technical solution of this utility model, the first bevel gear 61 rotates under the drive of the first motor 6, and then the first bevel gear ring 23 rotates by the meshing relationship between the first bevel gear 61 and the first bevel gear ring 23, which in turn drives the primary treatment tank 2 to rotate. Under the forward and reverse rotation of the first motor 6, the primary treatment tank 2 can be rotated in both directions, thereby realizing the stirring of the wastewater in the primary treatment tank 2. Potassium permanganate oxidant can then be added to the primary treatment tank 2 through the water injection pipe 51 to achieve the oxidation treatment of wastewater, oxidize organic matter and sulfides, and promote the oxidation reaction under the heating of the heating pipe 9. After the oxidation is completed, solid precipitate will appear to ensure the wastewater treatment effect.

[0044] In the above scheme, the sealing and filtering mechanism 4 includes a drive rod 41, a first spring plate 42, a first spring 43, a second spring plate 44, a second spring 45, a rubber sealing frustum 46, and a filter cover 47. The drive rod 41 passes through the cover plate 5 and extends to the bottom of the primary treatment tank 2. The first spring plate 42 is connected to the upper end of the drive rod 41, the second spring plate 44 is connected to the lower end of the drive rod 41, the filter cover 47 is sleeved on the lower end of the drive rod 41 and covers the outside of the water outlet pipe at the bottom of the primary treatment tank 2, and the rubber sealing frustum 46 is connected to the lower end of the drive rod 41 and seals the water outlet pipe at the bottom of the primary treatment tank 2. The first spring 43 and the second spring 45 are both sleeved on the drive rod 41. The first spring 43 abuts between the first spring plate 42 and the cover plate 5, and the second spring 45 abuts between the second spring plate 44 and the filter cover 47.

[0045] As an optimized technical solution of this utility model, in the wastewater treatment process, the filter cover 47 filters down the solid precipitate after oxidation treatment, and seals the outlet pipe at the bottom of the primary treatment tank 2 through the rubber sealing frustum 46. After the sedimentation is completed, the drive rod 41 can be pulled upward to make the rubber sealing frustum 46 disengage from the outlet at the bottom of the primary treatment tank 2, thereby ensuring that the oxidized water is transported to the secondary treatment tank 3 for further treatment. The first spring 43 is to ensure that the rubber sealing frustum 46 can be more firmly pressed against the outlet at the bottom of the primary treatment tank 2, and the second spring 45 is to ensure that the filter cover 47 can be more closely covered on the outside of the outlet of the primary treatment tank 2.

[0046] In the above scheme, the filter cover 47 is cylindrical, and the top of the filter cover 47 is provided with a through guide hole 471, which is slidably connected to the drive rod 41. The bottom of the filter cover 47 is provided with an outwardly extending inverted conical filter cover 472, which abuts against the inner wall of the bottom of the primary treatment tank 2.

[0047] As an optimized technical solution of this utility model, the filter cover 47 can filter out the precipitate generated by oxidation in wastewater treatment and collect the filtered solid precipitate in the inverted conical filter cover 472 to prevent the precipitate from falling into the bottom of the primary treatment tank 2 and affecting the wastewater treatment effect.

[0048] In the above scheme, a second motor 7 is installed on the right side of the wastewater treatment tank 1, and a second bevel gear 71 is connected to the output end of the second motor 7; a second conical toothed ring 32 is sleeved on the outer side of the lower end of the secondary treatment tank 3, and the second conical toothed ring 32 meshes with the second bevel gear 71; a second solenoid valve 34 is rotatably connected to the bottom of the secondary treatment tank 3 through the water outlet pipe, and a drain pipe 35 is connected to the second solenoid valve 34, which passes through the bottom right side of the wastewater treatment tank 1; a second connecting pipe 81 is provided between the secondary treatment tank 3 and the liquid pump 8.

[0049] As an optimized technical solution of this utility model, one end of the second connecting pipe 81 is connected to the liquid pump 8, and the other end of the second connecting pipe 81 passes through the top of the wastewater treatment tank cabinet and bends downward from the upper opening of the secondary treatment tank 3 to enter the secondary treatment tank 3. At the same time, the upper end of the secondary treatment tank 3 is provided with an inwardly extending baffle 31, which can prevent the wastewater in the secondary treatment tank 3 from rotating out during the rotation process. The secondary treatment tank 3 will use the meshing relationship of the second bevel gear 71 and the second bevel gear ring 32 to repeatedly rotate forward and reverse under the drive of the second motor 7, so that alkaline substances can be added to the secondary treatment tank 3 for adjustment, so that the treated wastewater meets the discharge standards before being discharged.

[0050] In the above scheme, the wastewater treatment tank 1 is provided with two symmetrically shaped flip-top doors 11 on the front side, which correspond to the primary treatment tank 2 and the secondary treatment tank 3 respectively.

[0051] As an optimized technical solution of this utility model, the flip-up cabinet door 11 can be opened to carry out inspection and maintenance of various components inside the wastewater treatment cabinet 1, so as to extend the service life of the device and reduce the production and maintenance costs of the device.

[0052] Specific implementation examples:

[0053] When using the power plant's circulating water treatment device for wastewater treatment, the circulating wastewater can be added to the primary treatment tank 2 through the water injection pipe 51. Impurities in the wastewater are filtered out through the filter bag 52, and potassium permanganate oxidant is added through the water injection pipe 51. The wastewater is then heated by the heating pipe 9 to promote the oxidation reaction between the wastewater and the oxidant. At the same time, the first motor 6 drives the first bevel gear 61 to rotate forward and backward, which in turn drives the primary treatment tank 2 to rotate repeatedly forward and backward through the first bevel gear ring 23, thereby further accelerating the oxidation of organic matter and sulfides in the wastewater.

[0054] After the circulating wastewater undergoes oxidation treatment, the oxidized wastewater in the primary treatment tank 2 is allowed to settle. The solid precipitate produced by oxidation is filtered out through the filter cover 47 and falls down along the inverted conical filter cover 472 into the cylinder between the inverted conical filter cover 472 and the filter cover 47. Then, the first solenoid valve 24 is opened and the liquid pump 8 is started. By pulling the drive rod 41 upward, the rubber sealing truncated cone 46 is disengaged from the outlet at the bottom of the primary treatment tank 2. The oxidized wastewater can then be transported through the filter cover 47 along the first connecting pipe 25 and the liquid pump 8 to the second connecting pipe 81 to the secondary treatment tank 3.

[0055] Secondly, if enough solid sediment accumulates inside the filter cover 47, the filter cover 47 can be removed by opening the cover plate 7 and using the drive rod 41, and the sediment inside the filter cover 47 can be taken out and cleaned.

[0056] Then, when the oxidized wastewater is sent into the secondary treatment tank 3, alkaline substances can be added to it. Driven by the forward and reverse rotation of the second motor 7, the secondary treatment tank 3 is driven by the second bevel gear 71 and the second bevel gear ring 32 to repeatedly rotate forward and reverse, which can promote the neutralization of the treated wastewater in the secondary treatment tank 3 until the treatment of the power plant's circulating wastewater meets the discharge standards. Then, the second solenoid valve 34 can be opened and the wastewater can be discharged through the drain pipe 35.

[0057] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A power plant desulfurization wastewater treatment device, comprising a wastewater treatment cabinet (1), and a first-stage treatment tank (2) and a second-stage treatment tank (3) arranged in the wastewater treatment cabinet (1), characterized in that: The primary treatment tank (2) is rotationally connected to the left side of the wastewater treatment cabinet (1), a plurality of heating pipes (9) extending upward and downward are equidistantly arranged on the inner side circumferential wall of the primary treatment tank (2), and the secondary treatment tank (3) is rotationally connected to the right side of the wastewater treatment cabinet (1); The primary treatment tank (2) and the secondary treatment tank (3) are connected with a liquid pumping pump (8), the liquid pumping pump (8) is arranged at the bottom center of the inner side of the wastewater treatment cabinet (1), the top of the primary treatment tank (2) is detachably connected with a cover plate (5), and the cover plate (5) is provided with a plugging and filtering mechanism (4) extending to the bottom of the primary treatment tank (2).

2. A power plant desulfurization wastewater treatment device according to claim 1, characterized in that: A first mounting edge (53) is arranged on the bottom outer side of the cover plate (5), a second mounting edge (21) is arranged on the top outer side of the primary treatment tank (2), and the first mounting edge (53) and the second mounting edge (21) are fastened by a plurality of fastening bolts (22). A water injection pipe (51) is arranged through the left side of the cover plate (5), and a filter pocket (52) is embedded in the pipe opening of the water injection pipe (51).

3. A power plant desulfurization wastewater treatment device according to claim 1, characterized in that: A first motor (6) is arranged on the left side of the wastewater treatment cabinet (1), and a first bevel gear (61) is connected to the output end of the first motor (6). A first conical gear ring (23) is sleeved on the outer side of the lower end of the primary treatment tank (2), and the first conical gear ring (23) is in gear engagement with the first bevel gear (61). A first electromagnetic valve (24) is rotationally connected to the bottom of the primary treatment tank (2) through a water outlet pipe, and a first connecting pipe (25) is connected between the first electromagnetic valve (24) and the liquid pumping pump (8).

4. A power plant desulfurization wastewater treatment device according to claim 1, characterized in that: The plugging and filtering mechanism (4) comprises a driving rod (41), a first spring plate (42), a first spring (43), a second spring plate (44), a second spring (45), a rubber plugging circular table (46), and a filter cover (47), the driving rod (41) penetrates through the cover plate (5) and extends to the bottom of the primary treatment tank (2); The first spring plate (42) is connected to the upper end of the driving rod (41), the second spring plate (44) is connected to the lower end of the driving rod (41), the filter cover (47) is sleeved on the lower end of the driving rod (41) and covers the outer side of the water outlet pipe at the bottom of the primary treatment tank (2), and the rubber plugging circular table (46) is connected to the lower end of the driving rod (41) and plugs the water outlet pipe at the bottom of the primary treatment tank (2); The first spring (43) and the second spring (45) are both sleeved on the driving rod (41), the first spring (43) abuts between the first spring plate (42) and the cover plate (5), and the second spring (45) abuts between the second spring plate (44) and the filter cover (47).

5. A power plant desulfurization wastewater treatment device according to claim 4, characterized in that: The filter cover (47) is cylindrical, a sliding guide hole (471) is arranged at the top of the filter cover (47) and is in sliding connection with the driving rod (41), and an outwardly extending inverted conical filter cover (472) is arranged at the bottom of the filter cover (47) and is in abutment with the inner wall of the bottom of the primary treatment tank (2).

6. A power plant desulfurization wastewater treatment device according to claim 1, characterized in that: The wastewater treatment cabinet (1) is provided with a second motor (7) on the right side thereof, and the second motor (7) is connected with a second bevel gear (71) at the output end thereof. A second bevel gear ring (32) is sleeved on the outer side of the lower end of the secondary treatment tank (3), and the second bevel gear ring (32) is in gear engagement with the second bevel gear (71). A second electromagnetic valve (34) is rotatably connected to the wastewater treatment cabinet (1) through a water outlet pipe at the bottom of the secondary treatment tank (3), a drain pipe (35) penetrating through the right side of the bottom of the wastewater treatment cabinet (1) is connected to the second electromagnetic valve (34), and the secondary treatment tank (3) and the liquid pumping pump (8) are provided with a second connecting pipe (81).

7. A power plant desulfurization wastewater treatment device according to claim 1, characterized in that: The wastewater treatment cabinet (1) is provided with two left-right symmetrical reversible cabinet doors (11) on the front side thereof, and the two reversible cabinet doors (11) correspond to the primary treatment tank (2) and the secondary treatment tank (3) respectively.

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